Instruction for editing Windows 2000 registry to enable 128K super blocked data transfers to tape, using an LSI SCSI Adapter In order to enable super blocked (128K) data transfers to tape the Windows 2000 registry needs to be edited as follows: By default, transfers are limited to 65536 bytes. Enabling larger transfers requires the addition of a new subkey in the registry. Use the following procedure to add the new subkey: 1. Click on "Start", select "Run", and open the REGEDT32 program. 2. Select HKEY_LOCAL_MACHINE and follow the tree structure down to the LSI driver as follows: HKEY_LOCAL_MACHINE SYSTEM CurrentControlSet Services symc8xx 3. Select the "symc8xx" key and use Edit/Add Key to create a new subkey named "Parameters". 4. Select the new "Parameters" key and use Edit/Add Key to create a new "Device" subkey. If multiple adapters are installed, you can specify separate subkeys for each adapter by using a subkey name of "DeviceN", where N = the SCSI host adapter number (0, 1, 2, etc.). The tree structure should now look as follows: HKEY_LOCAL_MACHINE SYSTEM CurrentControlSet Services symc8xx Parameters Device (or DeviceN) 5. Select the "Device" key and use Edit/Add Value to add a new value name of "MaximumSGList". Set the data type to REG_DWORD and enter a value from 16 to 255 (10 hex to FF hex). A value of 255 (FF hex) enables the maximum 1 MByte transfer size. Setting a value higher than 255 results with the default of 64K transfers. 6. Exit the Registry Editor, then shutdown and reboot the system.